Datahike in Class Path Breaks Datomic Client, Cannot Connect to Proxy Server

[samdesota]

Have a strange issue, I have a project where I'm syncing some datoms from Datomic into datahike persisted on level db, but when I include datahike in the project (using lein) it breaks the Datomic client, making it impossible to connect to Datomic.

Running (datomic.client.api/connect client {:db-name name}) hangs forever. I don't even need to import the datahike namespace, if datahike is in my project.clj, I cannot connect to Datomic. If I comment out datahike, I can connect again.

This leads me to believe it's a peer dependency issue of some sort? Any ideas where this would be from or any additional info I can look into to help debug?

[samdesota]

Some additional info, was running in a Calva Repl, there was an error I didn't see in another buffer:

Exception in thread "async-dispatch-2" java.lang.NoSuchMethodError: com.cognitect.transit.TransitFactory.writer(Lcom/cognitect/transit/TransitFactory$Format;Ljava/io/OutputStream;Ljava/util/Map;Lcom/cognitect/transit/WriteHandler;Ljava/util/function/Function;)Lcom/cognitect/transit/Writer;
        at cognitect.transit$writer.invokeStatic(transit.clj:157)
        at cognitect.transit$writer.invoke(transit.clj:139)
        at datomic.client.impl.shared.io$marshal.invokeStatic(io.clj:48)
        at datomic.client.impl.shared.io$marshal.invoke(io.clj:38)
        at datomic.client.impl.shared.io$client_req__GT_http_req.invokeStatic(io.clj:76)
        at datomic.client.impl.shared.io$client_req__GT_http_req.invoke(io.clj:73)
        at datomic.client.impl.shared.Client._async_op(shared.clj:383)
        at datomic.client.impl.shared.Client$fn__16730$state_machine__12285__auto____16745$fn__16747.invoke(shared.clj:407)
        at datomic.client.impl.shared.Client$fn__16730$state_machine__12285__auto____16745.invoke(shared.clj:406)
        at clojure.core.async.impl.ioc_macros$run_state_machine.invokeStatic(ioc_macros.clj:978)
        at clojure.core.async.impl.ioc_macros$run_state_machine.invoke(ioc_macros.clj:977)
        at clojure.core.async.impl.ioc_macros$run_state_machine_wrapped.invokeStatic(ioc_macros.clj:982)
        at clojure.core.async.impl.ioc_macros$run_state_machine_wrapped.invoke(ioc_macros.clj:980)
        at datomic.client.impl.shared.Client$fn__16730.invoke(shared.clj:406)
        at clojure.lang.AFn.run(AFn.java:22)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at clojure.core.async.impl.concurrent$counted_thread_factory$reify__6195$fn__6196.invoke(concurrent.clj:29)
        at clojure.lang.AFn.run(AFn.java:22)
        at java.lang.Thread.run(Thread.java:748)

Perhaps this is a version conflict issue with Transit.

[samdesota]

Okay, I was able to fix by adding a dependency on the latest version of transit to my project:

[com.cognitect/transit-clj "1.0.324"]

Not sure if there's anything actionable for this project, but perhaps updating dependencies. If not, sorry for the noise and feel free to close out the issue. Thanks!

[kordano]

For migrations you could also use wanderung which is targeted right at datomic cloud but we will add on-prem versions as well.

[whilo]

Thank you for reporting. We will try to bump the deps, but there is still an open issue here: cognitect/transit-java#31

[whilo]

This issue is probably solved by now as we ship a newer version with incognito. Incognito is also not needed anymore for the persistent-sorted-set backend, so it can be excluded from your deps in case you still run into the issue. Please reopen if the issue persists and is not easy to resolve.